AP BIOLOGY

Detailed explanation-1: -An adult frog devours its own weight of insects daily. Thus, if its population goes down, the insect population goes up. The extinction of frogs, on the one hand, means increasing the use of pesticides which is not only bad for agriculture in the long run, but poses a serious health hazard to all living organisms.

Detailed explanation-2: -If frog is completely removed from the given food chain, then no-one will eat the grasshopper, so the population of grasshoppers will increase. Since frog is completely removed, Snakes will not have enough food to eat, so population of snakes will decline.

Detailed explanation-3: -The average decline in overall amphibian populations is 3.79 percent per year, though the decline rate is more severe in some regions of the U.S., such as the West Coast and the Rocky Mountains. If this rate remains unchanged, some species will disappear from half of the habitats they occupy in about 20 years.

Detailed explanation-4: -Frogs play a central role in many ecosystems. They control the insect population, and they’re a food source for many larger animals. To keep things in balance, frogs use lots of survival tools. Some run away, play dead or swell up when threatened.